What is this sound in dB? Pilot study on measuring the degrees of understanding of sound level in university students

In this paper, for proposing appropriate information disclosure method of noise conditions, the objective is to grasp the degree of understanding to the size of the sound in the persons except the experts of acoustics. In particular, as an attempt to measure the degree of understanding of the loudness of university students, we measured the degree of understanding using the loudness chart kit developed by ourselves in lecture course. As a result, they commonly regarded the sound volumes of the rocket and the take-off of the airplanes as first or second loudest, but the subjective ranks of other sound sources were completely different among them. Some of the students who seem to have no knowledge at all about the sound source answered unreality values entirely.